Method of producing a matched parameter acceleration cancelling hydrophone专利检索-换能器材料变压器和转换设备专利检索查询-专利查询网

Method of producing a matched parameter acceleration cancelling hydrophone

阅读：42发布：2024-01-13

专利汇可以提供Method of producing a matched parameter acceleration cancelling hydrophone专利检索，专利查询，专利分析的服务。并且A seismic cable having minimum response to speed changes is provided. The cable includes a plurality of miniature seismic pressure sensitive detectors coupled one to another in such a manner so as to minimize through cancellation undesired electrical disturbance resulting from speed changes. Each detector includes transducers of the ceramic piezoelectric crystal type having matched geometric and physical property parameters. Each ceramic piezoelectric crystal is provided with metal electrodes such as, for example, gold, nickel, platinum, or rhodium which, in addition to being corrosion resistant and inactive as to the constituents in the ceramic material, are insoluble in liquids encountered by the detector in its use environment to avoid dendrite type growth of the metal through minute cracks developing in the ceramic which causes short circuits in the piezoelectric element.，下面是Method of producing a matched parameter acceleration cancelling hydrophone专利的具体信息内容。

权利要求

1. In a method for producing a pressure sensitive hydrophone having a pair of detector elements coupled in an acceleration noise cancelling mode while maintaining substantially equal response to pressure waves the improvement comprising: a. determining the geometric and physical property parameters and electrical parameters of a first detector element and its response to a selected acceleration noise wave and a pressure wave; b. selecting a second detector element having geometric and physical property parameters and electrical parameters which when combined electrically with the first detector element to form a hydrophone having substantially matching responses to acceleration noise waves and pressure waves; c. mounting said first and second detector elements in a frame such that they are coupled in an acceleration noise cancelling mode; and d. selectively varying geometric and physical property parameters of at least one of the detector elements after the mounting step and during further construction of the hydrophone to vary the response of the hydrophone to acceleration noise and pressure waves to produce an hydrophone having substantially acceleration noise cancelling response and duplicate pressure wave response.

2. A method for producing a pressure sensitive hydrophone comprising: a. determining the geometric and physical property parameters and electrical parametErs for a plurality of piezoelectric elements; b. selecting a first pair of piezoelectric elements having substantially matching geometric and physical property parameters and electrical parameters; c. selectively mounting the pair of piezoelectric elements on opposing sides of a first support member of known weight and compliance to form a first detector element; d. determining the geometric and physical property parameters and electrical parameters of the first detector element; e. selecting a second pair of piezoelectric elements having geometric and physical property parameters and electrical parameters substantially matching those of said first pair; f. selectively mounting the second pair of piezoelectric elements on opposing sides of a second support member having properties substantially matching those of the first support member, to form a second detector element having geometric and physical property parameters and electrical parameters substantially matching those of the first detector element; g. determining the geometric and physical property parameters and electrical parameters of the second detector element; h. selectively mounting the first and second detector elements in opposing ends of a hydrophone frame; i. selectively electrically coupling the detector elements in an acceleration noise cancelling mode; and j. selectively varying geometric and physical property parameters of at least one of the detector elements by selectively encapsulating the frame and detector elements thereby producing a hydrophone having substantially acceleration noise cancelling response and duplicate pressure wave response.

3. A method according to claim 2, wherein the step of selectively encapsulating the frame and detector elements includes selective removal of encapsulating material covering the detector elements of the hydrophone.

4. A method for producing a pressure sensitive hydrophone according to claim 2 wherein the second detector element is off set to the first detector element through geometric and physical property parameters and electrical parameters including for the electrical side the voltage output (Eo) of each detector element, the capacitance (Cex) of each piezoelectric element; and for the mechanical side the pressure force (F) owing to acoustic forces and a velocity force (V) owing to acceleration and deceleration forces, compliance (Cmx) of each detector element mounting, mass (Mx) of each piezoelectric element and diaphragm (Mrp), turns ratio (Nx) representing electromechanical transformer action of each piezoelectric element and the mechanical impedance (Z) of each detector element where x equals 1, 2, 3 or 4 indicating the particular piezoelectric elements and p equals 1 or 2 indicating the particular diaphragm.

5. A method for producing a pressure sensitive hydrophone according to claim 4 wherein the first and second detector elements are off set by feeding the known geometric and physical property parameters and electrical parameters of a first piezoelectric element of the first detector element into an automatic machine programmed to determine matching parameters for the remaining piezoelectric element and the second detector element in accordance with the following relationships:

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Method of producing a matched parameter acceleration cancelling hydrophone

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